2019
Apr
04

# Special talk : Prof. Efim Zelmanov (UCSD) : Growth Functions

## Lecturer:

Prof. Efim Zelmanov (UCSD)

12:00pm to 1:00pm

## Location:

Ross 70

We will discuss growth functions of algebras and monoids.

2019
Apr
04

Prof. Efim Zelmanov (UCSD)

12:00pm to 1:00pm

Ross 70

We will discuss growth functions of algebras and monoids.

2019
Mar
26

12:00pm to 1:00pm

Manchester faculty club

Singular vectors are the ones for which Dirichlet’s theorem can be infinitely improved. For example, any rational vector is singular. The sequence of approximations for any rational vector q is 'obvious'; the tail of this sequence contains only q. In dimension one, the rational numbers are the only singulars. However, in higher dimensions there are additional singular vectors. By Dani's correspondence, the singular vectors are related to divergent trajectories in Homogeneous dynamical systems. A corresponding 'obvious' divergent trajectories can also be defined.

2019
Mar
28

4:00pm to 5:15pm

Ross 70

The cost of a measure-preserving equivalence relation is a quantitative measure of its complexity. I will
explain what the cost is and then discuss a recent result of Tom Hutchcroft and Gabor Pete in which they construct,
for any group with property T, a free ergodic measure preserving action with cost 1.

2019
Mar
25

1:00pm to 2:00pm

Faculty lounge, Math building

Class field theory classifies abelian extensions of local and global fields
in terms of groups constructed from the base. We shall survey the main results of class
field theory for number fields and function fields alike. The goal of these introductory lectures
is to prepare the ground for the study of explicit class field theory in the function field case,
via Drinfeld modules.
I will talk for the first 2 or 3 times.

2019
Mar
26

1:00pm to 2:30pm

Room 110, Manchester Building, Jerusalem, Israel

The discovery of the Jones polynomial in the early 80's was the beginning of ``quantum topology'': the introduction of various invariants which, in one sense or another, arise from quantum mechanics and quantum field theory. There are many mathematical constructions of these invariants, but they all share the defect of being first defined in terms of a knot diagram, and only subsequently shown by calculation to be independent of the presentation. As a consequence, the geometric meaning has been somewhat opaque.

2019
Jun
26

2019
Mar
20

11:00am to 1:00pm

Ross 63

2019
Jun
12

2019
May
29

2019
May
01

2019
May
15

2019
Mar
27

2019
Jun
19

2019
Jun
05

2019
May
22